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2 years ago

Choose the correct answer to complete the thought. Someone who studies the physics of sound waves is a(an)______.

1 answer:

5 0

The best and most correct answer among the choices provided by your question is the fourth choice or letter D. Someone who studies the physics of sound waves is an acoustician.
A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an acoustical engineer.

I hope my answer has come to your help. Thank you for posting your question here in Brainly.

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What is the torque τb about axis b due to the force f⃗ ? (b is the point at cartesian coordinates (0,b), located a distance b fr

yKpoI14uk [10]

Check the attached file for the solution.

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2 years ago

Define wheel and axle 4 example of wheel and axle

natita [175]

Answer:

A system of two co-axial cylindersof different diameters which rotate together is called wheel and axle example; the door knob , knob of the tap ,screw driver,water tap

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2 years ago

A 4kg ball moving at 8m\sec

Llana [10]

Conservation of momentum: total momentum before = total momentum after

Momentum = mass x velocity

So before the collision:
4kg x 8m/s = 32
1kg x 0m/s = 0
32+0=32

Therefore after the collision
4kg x 4.8m/s = 19.2
1kg x βm/s = β
19.2 + β = 32

Therefore β = 12.8 m/s

8 0

2 years ago

Curtis, a student in our class, makes the following statement: The puck reached a slightly higher location on the ramp than I pr

Sindrei [870]

Answer and Explanation: No, the explanation is not plausible. The puck sliding on the ice is an example of the Principle of Conservation of Energy, which can be enunciated as "total energy of a system is constant. It can be changed or transferred but the total is always the same".

When a player hit the pluck, it starts to move, gaining kinetic energy (K). As it goes up a ramp, kinetic energy decreases and potential energy (P) increases until it reaches its maximum. When potential energy is maximum, kinetic energy is zero and vice-versa.

So, at the beginning of the movement the puck only has kinetic energy. At the end, it gains potential energy until its maximum.

The representation is as followed:

$K_{i}+P_{i}=K_{f}+P_{f}$

$K_{i}+0=0+P_{f}$

$\frac{1}{2}mv^{2} = mgh$

As we noticed, mass of the object can be cancelled from the equation, making height be:

$h=\frac{v^{2}}{2g}$

So, the height the puck reaches depends on velocity and acceleration due to gravity, not mass of the puck.

6 0

2 years ago

Suppose that a parallel-plate capacitor has a dielectric that breaks down if the electric field exceeds K V/m. Thus, the maximum

wel

Answer:

The least possible volume is $2.206*10^{-5} m^3$

Explanation:

We are asked by the least volume to store 1 mJ at 2000 V.

So, we can use the given formula for $W_{max}$ and solve for Vol.

$W_{max} = \frac{1}{2}\epsilon_r \epsilon_0 K^2 Vol\\Vol= 2W_{max}/(\epsilon_r \epsilon_0 K^2)$

replacing the values given in the problem and the permittivity of space $\epsilon_0$ which is $8.854*10^{-12}F/m$ we obtain Vol.

$Vol= 2*0.001 J/(1*8.854*10^{-12}F/m*(32*10^5V/m)^2)\\Vol= 0.002 J/( 90.66496F*V^2/m^3)\\Vol = 2.206*10^{-5} m^3$

Note that $FV^2= J$ in the above solution

Additional:

Taking into account that the volume of dieletric will be the area of plates (A) times the separation between plates (d).

$Vol=A*d$

You also can calculate A and d

d is calculated assuming that the $V_{max}$ is 2000 V and using given equation for $V_{max}$ :

$d= V_{max}/K\\d= 2000V/(32*10^5V/m)\\d=6.25*10^-4 m$

and A is calculated dividing Vol by d

$A= Vol/d=2.206*10^{-5} m^3/6.25*10^-4 m =0.0353 m^2$

3 0

2 years ago